Abstract A high-rate biological contactor process (HRBC) can be used as primary treatment instead of a clarifier to remove particulate, colloidal and soluble fractions of organic matter via biosorption plus flotation and divert it to anaerobic digestion for methane production, simultaneously reducing secondary aeration energy demand. Pilot and bench tests were conducted at a range of contact times (15–60 min) and contactor dissolved oxygen (DO) (0.2–2.0 mg/L) using waste activated sludge (WAS) from a trickling filter/solids contact (TF/SC) process in the HRBC. Biosorption performance was lowest when contact times were <30 min and unstable at DO < 0.5 mg/L. The overall average of 20% sCOD capture was similar to previous findings by others using WAS from conventional AS. The biomethane potential (BMP) of the HRBC float material can be as high as that of primary sludge (340–400 mL CH4/g VS), which is much greater than WAS. Operating the HRBC with a long contact time (>30 min) or with high DO (>1 mg/L) increases the amount of biosorption but reduces the BMP of the float. It was also found that biosorption only effectively occurs when a WAS is paired with the wastewater from the same facility.

中文翻译：

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使用滴滤池/固体接触过程中的废弃活性污泥的高速生物接触器系统

摘要高速生物接触器工艺 (HRBC) 可代替澄清器用作初级处理，通过生物吸附加浮选去除有机物的颗粒、胶体和可溶部分，并将其转移至厌氧消化以产生甲烷，同时减少二次曝气能量要求。使用来自滴滤器/固体接触器 (TF/ SC) HRBC 中的过程。当接触时间<30分钟时生物吸附性能最低，并且在DO<30分钟时不稳定。0.5毫克/升。20% sCOD 捕获的总体平均值与其他人之前使用传统 AS 的 WAS 的结果相似。HRBC漂浮材料的生物甲烷潜力（BMP）可与初级污泥的生物甲烷潜力（BMP）一样高（340-400 mL CH4/g VS），远大于WAS。以长接触时间（>30 分钟）或高 DO（>1 mg/L）操作 HRBC 会增加生物吸附量，但会降低浮子的 BMP。研究还发现，只有当 WAS 与同一设施的废水配对时，生物吸附才会有效发生。